Mold-locking device

• US 4,093,176 A
• Filed: 03/02/1977
• Issued: 06/06/1978
• Est. Priority Date: 03/03/1976
• Status: Expired due to Term

• Current Assignee: Industries et Techniques D'Ameublement
• Original Assignee: Industries et Techniques D'Ameublement
• Inventors: Contastin, Andre
• Primary Examiner(s): Husar, Francis S.
• Assistant Examiner(s): Brown, John S.
• Application Number:
  US05/773,780
• Time in Patent Office: 461 Days
• Field of Search: 249/167, 249/169, 249/219 R, 249/139, 249/172, 164/386, 164/388, 164/384, 164/390, 164/412, 269/22, 269/25, 269/27, 269/31, 24/DIG. 26, 24/263 DA, 24/263 DH, 248/226.2, 425/451.9, 425/432, 425/179, 292/256, 292/256.5, 292/256.65, 292/110, 292/129, 292/144, 292/201, 92/20, 92/25, 92/34
• US Class Current: 249/167
• CPC Class Codes: B29C 2033/207 mould clamping by pivoting members
• CPC Class Codes: B29C 33/20 Opening, closing or clamping
• CPC Class Codes: B29C 33/202 Clamping means operating on closed or nearly closed mould parts, the clamping means being independently movable of the opening or closing means clamping devices for injection moulding machines B29C45/64
• CPC Class Codes: Y10S 24/26 Fluid pressure
• CPC Class Codes: Y10T 24/44068 having gripping member actuated by fluid force
• CPC Class Codes: Y10T 292/0914 Operating means
• CPC Class Codes: Y10T 292/20 Clamps

Abstract

A mold-locking or catching device which comprises a support on one mold half or part, a bellows anchored to this support at one side of the bellows, a hook engageable with the rim of the other mold half or part and carried by the other side of the bellows and means for swinging the hook laterally into and out of engagement with the rim of the other mold half when the bellows is activated by fluid pressure or depressurized respectively.

Claims

1. The combination of a two part mold having engaging rims and a locking device for said mold, said locking device comprising:

a support means fixed at one end to one of said rims;

a flexible bellows mounted at the other end on said support means;

a movable plate member secured to the opposite end of the bellows;

air inlet means passing through said movable plate member to the interior of the bellows;

a hook-like member rigidly secured to the movable plate member; and

compression spring means extending between the hook-like member and the fixed support means; and

means on said hook-like member and said support means for limiting movement by the spring means of the movable plate member towards the fixed support member in the absence of pressure in the bellows to pivot said hook-like member relative to said mold to engage the other of said rims.

2. The combination defined in claim 1 wherein the compression spring means is a helical compression spring bearing at one end against a bar secured to the hook-like member and at the other end on the fixed support means, the bar being situated to the same side of the hook-like member as a projecting curved finger of the hook-like member.

3. The combination defined in claim 1 wherein the means for limiting movement of the movable plate member towards the fixed support means comprises an elongated aperture formed in the fixed support means and extending perpendicular to the joint plane between the parts of the mold and a rod secured to said hook-line member and extending within the aperture whereby movement of the movable plate towards the fixed support means under the action of the spring means continues until the rod meets the bottom of the aperture, the continued thrust of the spring means causing the movable plate member and thus the hook-like member to pivot.

4. The combination defined in claim 1 wherein the fixed support means includes a post, said post being secured to one of said rims of one of said mold parts.